/* =========================================================================
   O2AKSO — Independent Site Design System
   Layout & component metrics replicated 1:1 from realme.com (Nuxt build).
   Reference values pulled from realme.com/global production CSS:
     .sec-wrapper 1200px · .sec bg #f5f5f5 · .sec-title 24/700/36
     .banner 650px · .plate-primary 497x200 · .plate-discover 592x320
     .plate-activity 1200x140 · .plate-normal img 160px · swiper btns 48px
   Breakpoints mirror realme: 768 / 1120 / 1439
   ========================================================================= */

/* ---------- 1. Tokens ---------------------------------------------------- */
:root {
  /* brand — sampled from the O2AKSO navy logo */
  --brand: #1b2a5b;
  --brand-ink: #101c40;
  --brand-soft: #eef1f8;
  --accent: #2f6bff;

  /* neutral system — matches realme greys exactly */
  --bg: #f5f5f5;
  --surface: #fff;
  --text: #000;
  --text-2: #666;
  --text-3: #777;
  --text-inv: #fff;
  --line: #e5e5e5;
  --line-2: #eee;

  /* geometry */
  --wrap: 1200px;
  --gutter: 20px;
  --radius: 0;          /* realme uses square corners throughout */
  --radius-pill: 999px;

  /* type scale — realme desktop values */
  --fs-hero: 48px;
  --fs-hero-sub: 28px;
  --fs-sec: 24px;
  --fs-card: 16px;
  --fs-body: 14px;
  --fs-small: 12px;
  --lh-hero: 52px;

  /* motion */
  --ease: cubic-bezier(.25, .46, .45, .94);
  --dur: .3s;

  /* fonts */
  --font-display: 'Gilroy', 'Manrope', 'Poppins', -apple-system, BlinkMacSystemFont,
    'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-body: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
}

/* CJK tuning — 中文视觉比同号英文更大，按 report.md 法则做整体字号补偿 */
html[lang^='zh'] { --fs-hero: 44px; --fs-hero-sub: 26px; --fs-sec: 23px; }

/* ---------- 2. Reset ----------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; border: 0; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; }
h1, h2, h3, h4, h5 { margin: 0; font-family: var(--font-display); font-weight: 700; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
table { border-collapse: collapse; width: 100%; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 200;
  background: var(--brand); color: #fff; padding: 12px 20px;
}
.skip-link:focus { left: 0; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---------- 3. Layout primitives (realme .sec / .sec-wrapper) ------------- */
.sec { background-color: var(--bg); }
.sec--alt { background-color: var(--surface); }

.sec-wrapper {
  margin: 0 auto;
  padding-top: 40px;
  position: relative;
  width: var(--wrap);
  max-width: 100%;
}
.sec-wrapper--tight { padding-top: 22px; }
.sec-wrapper--flush { padding-top: 10px; }
.sec-wrapper__pad { padding-bottom: 40px; }

.sec-title { font-size: var(--fs-sec); font-weight: 700; line-height: 36px; margin-bottom: 20px; }
.sec-sub { color: var(--text-2); font-size: var(--fs-body); line-height: 1.7; margin-top: -8px; margin-bottom: 20px; max-width: 860px; }

.sec-header {
  align-items: center;
  display: flex;
  justify-content: space-between;
  margin-bottom: 20px;
  gap: 16px;
}
.sec-header .sec-title { margin-bottom: 0; }

.sec-more {
  color: var(--text-2);
  font-size: var(--fs-body);
  line-height: 16px;
  padding-right: 16px;
  position: relative;
  white-space: nowrap;
  transition: color var(--dur) var(--ease);
}
.sec-more::after {
  content: '';
  position: absolute;
  right: 0; top: 50%;
  width: 7px; height: 7px;
  margin-top: -5px;
  border-right: 1.5px solid currentColor;
  border-top: 1.5px solid currentColor;
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease);
}
.sec-more:hover { color: var(--text); }
.sec-more:hover::after { transform: translateX(3px) rotate(45deg); }

/* ---------- 4. Buttons (realme .btn-fill-black / -white) ----------------- */
.btn {
  align-items: center;
  box-sizing: border-box;
  display: inline-flex;
  font-size: var(--fs-card);
  font-weight: 700;
  height: 40px;
  justify-content: center;
  line-height: 19px;
  min-width: 140px;
  padding: 0 20px;
  overflow: hidden;
  text-align: center;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease), opacity var(--dur) var(--ease);
  border: 1px solid transparent;
}
.btn-fill-black { background: #000; color: #fff; }
.btn-fill-black:hover { background: #fff; color: #000; }
.btn-fill-white { background: #fff; color: #000; }
.btn-fill-white:hover { background: #000; border-color: #fff; color: #fff; }
.btn-fill-brand { background: var(--brand); color: #fff; }
.btn-fill-brand:hover { background: var(--brand-ink); }
.btn-ghost { border-color: var(--line); background: transparent; color: var(--text); }
.btn-ghost:hover { border-color: var(--text); }
.btn-sm { height: 32px; font-size: 13px; min-width: 0; padding: 0 14px; }
.btn-block { width: 100%; }
.btn[disabled] { opacity: .45; pointer-events: none; }

/* ---------- 5. Header ---------------------------------------------------- */
.header {
  background: var(--surface);
  border-bottom: 1px solid var(--line-2);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header__utility {
  background: var(--brand);
  color: rgba(255, 255, 255, .82);
  font-size: var(--fs-small);
}
.header__utility-inner {
  margin: 0 auto;
  max-width: var(--wrap);
  padding: 7px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.header__utility-links { display: flex; gap: 20px; align-items: center; }
.header__utility a { transition: color var(--dur) var(--ease); }
.header__utility a:hover { color: #fff; }

.header__main {
  margin: 0 auto;
  max-width: var(--wrap);
  padding: 0 var(--gutter);
  height: 64px;
  display: flex;
  align-items: center;
  gap: 28px;
}
.header__logo img { height: 26px; width: auto; }

.header__nav { display: flex; align-items: center; gap: 26px; flex: 1; }
.header__nav > li { position: relative; }
.header__nav a {
  display: block;
  padding: 22px 0;
  font-size: var(--fs-body);
  font-weight: 600;
  position: relative;
  transition: color var(--dur) var(--ease);
}
.header__nav a::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 16px;
  height: 2px;
  background: var(--brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur) var(--ease);
}
.header__nav a:hover::after,
.header__nav a[aria-current='page']::after { transform: scaleX(1); }
.header__nav a[aria-current='page'] { color: var(--brand); }

/* dropdown */
.header__nav .has-sub > a::before {
  content: '';
  display: inline-block;
  margin-left: 6px;
  width: 5px; height: 5px;
  border-right: 1.4px solid currentColor;
  border-bottom: 1.4px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
}
.submenu {
  position: absolute;
  top: 100%; left: -16px;
  min-width: 232px;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: 0 12px 32px rgba(0, 0, 0, .1);
  padding: 8px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility var(--dur);
}
.has-sub:hover .submenu,
.has-sub:focus-within .submenu { opacity: 1; visibility: visible; transform: translateY(0); }
.submenu a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 16px;
  font-size: var(--fs-body);
  font-weight: 400;
}
.submenu a::after { display: none; }
.submenu a:hover { background: var(--bg); }
.submenu small { display: block; color: var(--text-3); font-size: var(--fs-small); }

.header__actions { display: flex; align-items: center; gap: 12px; margin-left: auto; }

/* language switcher — native names, no flags (per house style guide) */
.lang {
  position: relative;
}
.lang__btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 34px;
  padding: 0 12px;
  border: 1px solid var(--line);
  font-size: 13px;
  font-weight: 600;
  transition: border-color var(--dur) var(--ease);
}
.lang__btn:hover { border-color: var(--text); }
.lang__btn::after {
  content: '';
  width: 5px; height: 5px;
  border-right: 1.4px solid currentColor;
  border-bottom: 1.4px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
}
.lang__menu {
  position: absolute;
  top: calc(100% + 8px); right: 0;
  min-width: 176px;
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: 0 12px 32px rgba(0, 0, 0, .1);
  padding: 6px 0;
  opacity: 0; visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility var(--dur);
}
.lang:hover .lang__menu,
.lang:focus-within .lang__menu,
.lang.is-open .lang__menu { opacity: 1; visibility: visible; transform: translateY(0); }
.lang__menu a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 16px;
  font-size: 13px;
}
.lang__menu a:hover { background: var(--bg); }
.lang__menu a[aria-current='true'] { color: var(--brand); font-weight: 700; }
.lang__menu a[aria-current='true']::after { content: '\2713'; }

.burger {
  display: none;
  width: 40px; height: 40px;
  align-items: center; justify-content: center;
  flex-direction: column; gap: 5px;
}
.burger span {
  display: block;
  width: 20px; height: 2px;
  background: var(--text);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.burger[aria-expanded='true'] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger[aria-expanded='true'] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded='true'] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.drawer {
  position: fixed;
  inset: 0;
  z-index: 99;
  background: rgba(16, 28, 64, .5);
  opacity: 0; visibility: hidden;
  transition: opacity var(--dur) var(--ease), visibility var(--dur);
}
.drawer.is-open { opacity: 1; visibility: visible; }
.drawer__panel {
  position: absolute;
  top: 0; right: 0; bottom: 0;
  width: min(360px, 86vw);
  background: var(--surface);
  padding: 20px 24px 40px;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform var(--dur) var(--ease);
}
.drawer.is-open .drawer__panel { transform: translateX(0); }
.drawer__head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; }
.drawer__head img { height: 24px; }
.drawer__close { font-size: 26px; line-height: 1; padding: 4px 8px; }
.drawer a.drawer__link {
  display: block;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-2);
  font-size: 15px;
  font-weight: 600;
}
.drawer__group { padding: 18px 0 6px; font-size: var(--fs-small); color: var(--text-3); text-transform: uppercase; letter-spacing: .08em; }
.drawer .btn { margin-top: 24px; }

/* ---------- 6. Hero banner (realme .banner) ------------------------------ */
.hero { position: relative; height: 650px; background: var(--surface); overflow: hidden; }
@media screen and (max-width: 1439px) { .hero { height: 488px; } }
@media screen and (max-width: 1120px) { .hero { height: 400px; } }
@media screen and (max-width: 768px) { .hero { height: auto; min-height: 0; } }

.hero__track { height: 100%; position: relative; }

.hero__slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity .6s var(--ease), visibility .6s;
}
.hero__slide.is-active { opacity: 1; visibility: visible; }

.hero__bg { position: absolute; inset: 0; overflow: hidden; }
.hero__bg img { width: 100%; height: 100%; object-fit: cover; }
/* the export renders sit on light grey, so the 48px white headline needs a
   brand-navy scrim anchored left — same left-to-right fade realme uses on
   its darker campaign art, inverted to suit this catalogue's photography. */
.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg,
    rgba(16, 28, 64, .92) 0%,
    rgba(16, 28, 64, .84) 24%,
    rgba(16, 28, 64, .45) 50%,
    rgba(16, 28, 64, 0) 76%);
}
@media screen and (max-width: 768px) {
  .hero__bg::after { background: linear-gradient(0deg, rgba(16, 28, 64, .94) 0%, rgba(16, 28, 64, .8) 42%, rgba(16, 28, 64, .1) 80%); }
}

.hero__inner {
  position: relative;
  margin: 0 auto;
  max-width: var(--wrap);
  height: 100%;
  display: flex;
  align-items: center;
}
.hero__content { width: 500px; padding-left: 50px; color: var(--text-inv); }
.hero__content--dark { color: var(--text); }

.hero__eyebrow {
  display: inline-block;
  font-size: var(--fs-card);
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: 5px 12px;
  border: 1px solid currentColor;
  margin-bottom: 14px;
}
.hero__title { font-size: var(--fs-hero); font-weight: 600; line-height: var(--lh-hero); }
.hero__subtitle { font-size: var(--fs-hero-sub); font-weight: 600; line-height: 1.3; margin-top: 16px; }
.hero__point { font-size: var(--fs-card); line-height: 1.4; margin-top: 16px; }
.hero__point + .hero__point { margin-top: 4px; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 20px; margin-top: 28px; }
.hero__cta .btn { backdrop-filter: blur(.3rem); -webkit-backdrop-filter: blur(.3rem); }

/* swipe arrows — realme .swiper-button-container, 48px circles, opacity .3→1 */
.hero__nav {
  display: flex;
  justify-content: space-between;
  left: 50%;
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: min(1340px, 100%);
  padding: 0 24px;
  pointer-events: none;
}
.hero__arrow {
  pointer-events: auto;
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--surface);
  display: flex; align-items: center; justify-content: center;
  opacity: .35;
  transition: opacity var(--dur) var(--ease), background var(--dur) var(--ease);
}
.hero__arrow:hover { opacity: 1; }
.hero__arrow::before {
  content: '';
  width: 9px; height: 9px;
  border-right: 1.5px solid #000;
  border-top: 1.5px solid #000;
  transform: rotate(45deg);
  margin-left: -3px;
}
.hero__arrow--prev::before { transform: rotate(-135deg); margin-left: 3px; margin-right: -3px; }

.hero__dots {
  position: absolute;
  bottom: 28px; left: 50%;
  transform: translateX(-50%);
  display: flex; gap: 10px;
  z-index: 2;
}
.hero__dots button {
  width: 8px; height: 8px;
  border-radius: 100%;
  background: rgba(255, 255, 255, .5);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, .08);
  transition: width var(--dur) var(--ease), background var(--dur) var(--ease);
}
.hero__dots button.is-active { width: 22px; background: #fff; }

@media screen and (max-width: 768px) {
  .hero__content { width: auto; padding: 0; }
  .hero__inner { padding: 0 var(--gutter); align-items: flex-end; min-height: 420px; }
  .hero__title { font-size: 30px; line-height: 34px; }
  .hero__subtitle { font-size: 19px; }
  .hero__nav { display: none; }
}

/* ---------- 7. plate-primary (realme 497x200 product card) ---------------- */
.product-content {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
}

.activity-list { display: grid; gap: 16px; }

.catalog-item { opacity: .82; }
.catalog-item .cat-item__media img { filter: saturate(.85); }
.plate-primary {
  align-items: center;
  background: var(--surface);
  color: var(--text);
  display: flex;
  height: 200px;
  justify-content: space-between;
  margin-bottom: 16px;
  padding: 40px;
  width: 497px;
  overflow: hidden;
  position: relative;
}
.plate-primary__img {
  flex: 0 0 auto;
  height: 160px;
  width: 160px;
  display: flex; align-items: center; justify-content: center;
}
.plate-primary__img img { max-height: 100%; max-width: 100%; object-fit: contain; }
.plate-primary__content { width: 100%; padding-left: 24px; }
.plate-primary__title { font-size: var(--fs-card); font-weight: 700; line-height: 22px; }
.plate-primary__sellpoint {
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  display: -webkit-box;
  font-size: 13px;
  color: var(--text-2);
  line-height: 20px;
  height: 40px;
  margin: 8px 0 14px;
  overflow: hidden;
}
.plate-primary__meta { font-size: var(--fs-small); color: var(--text-3); }
.plate-primary__link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: var(--fs-card); font-weight: 700;
  color: var(--brand);
}
.plate-primary__link::after {
  content: '';
  width: 6px; height: 6px;
  border-right: 1.5px solid currentColor;
  border-top: 1.5px solid currentColor;
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease);
}
.plate-primary:hover .plate-primary__link::after { transform: translateX(4px) rotate(45deg); }

/* ---------- 8. plate-normal (realme small product card) ------------------ */
.plate-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.plate-normal {
  align-items: center;
  background: var(--surface);
  display: flex;
  flex-direction: column;
  padding: 40px 20px;
  overflow: hidden;
  text-align: center;
  position: relative;
  min-height: 300px;
}
.plate-normal__img {
  height: 160px;
  width: 100%;
  display: flex; align-items: center; justify-content: center;
}
.plate-normal__img img { max-height: 100%; max-width: 100%; object-fit: contain; }
.plate-normal__title { font-size: var(--fs-card); font-weight: 600; line-height: 20px; margin-top: 14px; }
.plate-normal__sellpoint {
  color: var(--text-2);
  font-size: 12px;
  line-height: 18px;
  margin: 8px 0 12px;
  min-height: 36px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
}
.plate-normal__meta { font-size: var(--fs-small); color: var(--text-3); margin-top: auto; padding-top: 10px; }

/* ---------- 9. plate-activity (realme 1200x140 strip) -------------------- */
.plate-activity { height: 140px; overflow: hidden; width: 100%; position: relative; display: block; }
.plate-activity img { width: 100%; height: 100%; object-fit: cover; }
.plate-activity__body {
  position: absolute;
  inset: 0;
  padding: 0 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  color: var(--text-inv);
  background: linear-gradient(90deg, rgba(16, 28, 64, .78) 0%, rgba(16, 28, 64, .18) 62%, rgba(16, 28, 64, 0) 100%);
}
.plate-activity__title { font-size: 20px; font-weight: 700; line-height: 26px; }
.plate-activity__desc { font-size: 13px; line-height: 18px; margin-top: 6px; opacity: .9; }
.plate-activity__go { font-size: 12px; font-weight: 700; margin-top: 8px; opacity: .9; }

/* ---------- 10. plate-discover (realme 592x320 scenario card) ------------ */
.plate-discover-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.plate-discover {
  height: 320px;
  overflow: hidden;
  position: relative;
  width: 100%;
  display: block;
  background: var(--brand-ink);
}
.plate-discover img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease); }
.plate-discover:hover img { transform: scale(1.04); }
.plate-discover__body {
  box-sizing: border-box;
  color: #000;
  padding: 40px 80px;
  position: absolute;
  text-align: center;
  top: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: linear-gradient(180deg, rgba(255, 255, 255, .06) 0%, rgba(255, 255, 255, .82) 62%, rgba(255, 255, 255, .94) 100%);
}
.plate-discover__body.is-dark {
  color: #fff;
  background: linear-gradient(180deg, rgba(16, 28, 64, .18) 0%, rgba(16, 28, 64, .68) 55%, rgba(16, 28, 64, .88) 100%);
}
.plate-discover__title { font-size: 22px; line-height: 28px; font-weight: 700; margin-bottom: 10px; }
.plate-discover__desc { font-size: var(--fs-body); line-height: 18px; opacity: .82; }

/* ---------- 11. plate-hover (realme shared hover lift) -------------------- */
.plate-hover { transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease); transform: translateZ(0); }
@media (hover: hover) and (min-width: 769px) {
  .plate-hover:hover { transform: translate3d(0, -2px, 0); box-shadow: 0 14px 34px rgba(16, 28, 64, .12); }
}

/* ---------- 12. Trust / certification band ------------------------------- */
.trust-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; }
.trust-card {
  background: var(--surface);
  padding: 24px 16px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.trust-card__img { width: 100%; height: 132px; object-fit: contain; background: var(--bg); }
.trust-card__name { font-size: 13px; font-weight: 700; line-height: 18px; }
.trust-card__note { font-size: var(--fs-small); color: var(--text-3); line-height: 16px; }

.stat-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.stat {
  background: var(--surface);
  padding: 32px 20px;
  text-align: center;
}
.stat__value { font-family: var(--font-display); font-size: 40px; font-weight: 700; line-height: 44px; color: var(--brand); }
.stat__label { font-size: 13px; color: var(--text-2); margin-top: 8px; line-height: 18px; }

/* ---------- 13. Advantage list ------------------------------------------- */
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.adv-card { background: var(--surface); padding: 28px 24px; height: 100%; }
.adv-card__no { font-family: var(--font-display); font-size: 13px; font-weight: 700; color: var(--brand); letter-spacing: .1em; }
.adv-card__title { font-size: 17px; font-weight: 700; line-height: 24px; margin: 10px 0 10px; }
.adv-card__desc { font-size: 13px; color: var(--text-2); line-height: 20px; }

/* ---------- 14. Product centre ------------------------------------------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 16px 0 24px;
}
.filter-bar__label { font-size: 13px; color: var(--text-2); margin-right: 4px; }
.chip {
  height: 34px;
  padding: 0 16px;
  border: 1px solid var(--line);
  background: var(--surface);
  font-size: 13px;
  font-weight: 600;
  transition: all var(--dur) var(--ease);
}
.chip:hover { border-color: var(--text); }
.chip.is-active { background: var(--brand); border-color: var(--brand); color: #fff; }
.filter-bar__count { margin-left: auto; font-size: 13px; color: var(--text-3); }

.cat-list { display: grid; gap: 24px; }
.cat-item {
  background: var(--surface);
  display: grid;
  grid-template-columns: 520px 1fr;
  min-height: 340px;
  overflow: hidden;
}
.cat-item__media { background: var(--bg); display: flex; align-items: center; justify-content: center; padding: 28px; }
.cat-item__media img { max-height: 100%; max-width: 100%; object-fit: contain; }
.cat-item__body { padding: 36px 40px; display: flex; flex-direction: column; }
.cat-item__eyebrow { font-size: var(--fs-small); font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--brand); }
.cat-item__title { font-size: 22px; font-weight: 700; line-height: 30px; margin: 10px 0 12px; }
.cat-item__desc { font-size: var(--fs-body); line-height: 22px; color: var(--text-2); }
.cat-item__highlights { margin: 16px 0 20px; display: grid; gap: 8px; }
.cat-item__highlights li { font-size: 13px; line-height: 20px; padding-left: 20px; position: relative; }
.cat-item__highlights li::before {
  content: '';
  position: absolute; left: 0; top: 8px;
  width: 7px; height: 7px;
  border-right: 1.6px solid var(--brand);
  border-bottom: 1.6px solid var(--brand);
  transform: rotate(45deg);
}
.cat-item__actions { margin-top: auto; display: flex; gap: 12px; flex-wrap: wrap; }
.cat-item[data-status='planned'] { opacity: .72; }

/* ---------- 15. Product detail ------------------------------------------- */
.pdp { background: var(--surface); }
.pdp__hero { background: var(--bg); }
.pdp__hero-inner {
  margin: 0 auto;
  max-width: var(--wrap);
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 48px;
  padding: 48px 0 56px;
  align-items: start;
}
.gallery__main {
  background: var(--surface);
  aspect-ratio: 4 / 3;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.gallery__main img { width: 100%; height: 100%; object-fit: contain; }
.gallery__thumbs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 12px; }
.gallery__thumb {
  background: var(--surface);
  aspect-ratio: 1;
  border: 1px solid transparent;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
  transition: border-color var(--dur) var(--ease);
}
.gallery__thumb img { width: 100%; height: 100%; object-fit: contain; }
.gallery__thumb.is-active { border-color: var(--brand); }

.pdp__eyebrow { font-size: var(--fs-small); font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--brand); }
.pdp__title { font-size: 34px; font-weight: 700; line-height: 42px; margin: 12px 0 14px; }
.pdp__tagline { font-size: 17px; line-height: 26px; color: var(--text-2); }
.pdp__highlights { margin: 22px 0; display: grid; gap: 10px; }
.pdp__highlights li { font-size: 14px; line-height: 22px; padding-left: 22px; position: relative; }
.pdp__highlights li::before {
  content: '';
  position: absolute; left: 0; top: 8px;
  width: 8px; height: 8px;
  border-radius: 50%;
  border: 2px solid var(--brand);
}
.pdp__actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.pdp__note { font-size: var(--fs-small); color: var(--text-3); margin-top: 14px; line-height: 18px; }

.pdp__section { margin: 0 auto; max-width: var(--wrap); padding: 56px var(--gutter); }
.pdp__section--alt { background: var(--bg); }
.pdp__h2 { font-size: 26px; font-weight: 700; line-height: 34px; margin-bottom: 10px; }
.pdp__lead { color: var(--text-2); font-size: 15px; line-height: 26px; max-width: 820px; margin-bottom: 28px; }

.prose p { font-size: 15px; line-height: 28px; color: var(--text-2); }
.prose p + p { margin-top: 16px; }
.prose strong { color: var(--text); }

/* spec table */
.spec-group + .spec-group { margin-top: 32px; }
.spec-group__title {
  font-size: 17px; font-weight: 700;
  padding-bottom: 10px; margin-bottom: 4px;
  border-bottom: 2px solid var(--brand);
  display: inline-block;
}
.spec-table th, .spec-table td {
  text-align: left;
  padding: 13px 16px;
  font-size: 14px;
  line-height: 22px;
  border-bottom: 1px solid var(--line-2);
  vertical-align: top;
}
.spec-table th { width: 40%; font-weight: 600; color: var(--text); background: var(--bg); }
.spec-table td { color: var(--text-2); }
.spec-table tr:hover td { background: var(--brand-soft); }

/* procurement info grid — the 8 questions buyers actually ask */
.proc-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.proc-card { background: var(--bg); padding: 22px 24px; }
.proc-card__label { font-size: 13px; font-weight: 700; color: var(--brand); letter-spacing: .04em; text-transform: uppercase; }
.proc-card__value { font-size: 15px; line-height: 24px; margin-top: 8px; }
.proc-card__note { font-size: var(--fs-small); color: var(--text-3); margin-top: 6px; line-height: 18px; }

/* compliance cards */
.comp-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.comp-card { background: var(--surface); padding: 24px; display: flex; gap: 16px; align-items: flex-start; }
.comp-card__img { width: 68px; height: 92px; object-fit: contain; background: var(--bg); flex: 0 0 auto; }
.comp-card__name { font-size: 15px; font-weight: 700; line-height: 22px; }
.comp-card__issuer { font-size: var(--fs-small); color: var(--text-3); margin-top: 4px; }
.comp-card__note { font-size: 13px; color: var(--text-2); line-height: 20px; margin-top: 8px; }

/* FAQ */
.faq { max-width: 900px; border-top: 1px solid var(--line); }
.faq__item { border-bottom: 1px solid var(--line); }
.faq__q {
  width: 100%;
  text-align: left;
  padding: 20px 40px 20px 0;
  font-size: 16px;
  font-weight: 600;
  line-height: 24px;
  position: relative;
  transition: color var(--dur) var(--ease);
}
.faq__q::after {
  content: '';
  position: absolute; right: 8px; top: 50%;
  width: 9px; height: 9px;
  margin-top: -6px;
  border-right: 1.6px solid currentColor;
  border-bottom: 1.6px solid currentColor;
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease);
}
.faq__item.is-open .faq__q::after { transform: rotate(-135deg); margin-top: -2px; }
.faq__a { display: none; padding: 0 40px 22px 0; font-size: 14px; line-height: 24px; color: var(--text-2); }
.faq__item.is-open .faq__a { display: block; }

/* download cards */
.dl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.dl-card { background: var(--surface); padding: 28px 24px; display: flex; flex-direction: column; height: 100%; }
.dl-card__type { font-size: var(--fs-small); font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--brand); }
.dl-card__title { font-size: 16px; font-weight: 700; line-height: 24px; margin: 10px 0 8px; }
.dl-card__desc { font-size: 13px; color: var(--text-2); line-height: 20px; flex: 1; }
.dl-card .btn { margin-top: 18px; }

/* related */
.rel-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }

/* ---------- 16. Forms ---------------------------------------------------- */
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px 20px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field--full { grid-column: 1 / -1; }
.field label { font-size: 13px; font-weight: 600; }
.field label .req { color: #c0392b; margin-left: 3px; }
.field input, .field select, .field textarea {
  height: 44px;
  padding: 0 14px;
  border: 1px solid var(--line);
  background: var(--surface);
  font-size: 14px;
  transition: border-color var(--dur) var(--ease);
  width: 100%;
}
.field textarea { height: auto; padding: 12px 14px; resize: vertical; min-height: 128px; line-height: 22px; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--brand); }
.field input[aria-invalid='true'], .field textarea[aria-invalid='true'] { border-color: #c0392b; }
.field__err { font-size: var(--fs-small); color: #c0392b; min-height: 16px; }
.field select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--text-2) 50%), linear-gradient(135deg, var(--text-2) 50%, transparent 50%); background-position: calc(100% - 18px) 19px, calc(100% - 13px) 19px; background-size: 5px 5px, 5px 5px; background-repeat: no-repeat; }

.form-note { font-size: var(--fs-small); color: var(--text-3); line-height: 20px; margin-top: 14px; }
.form-status { margin-top: 18px; padding: 16px 18px; font-size: 14px; line-height: 22px; display: none; }
.form-status.is-ok { display: block; background: #eaf6ee; border-left: 3px solid #2e9e5b; color: #1d6b3f; }
.form-status.is-err { display: block; background: #fdecea; border-left: 3px solid #c0392b; color: #93261a; }

.contact-grid { display: grid; grid-template-columns: 1.35fr .65fr; gap: 32px; align-items: start; }
.contact-panel { background: var(--surface); padding: 32px; }
.contact-aside { display: grid; gap: 16px; }
.contact-card { background: var(--surface); padding: 24px; }
.contact-card__label { font-size: var(--fs-small); font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--brand); }
.contact-card__value { font-size: 15px; line-height: 24px; margin-top: 8px; word-break: break-word; }
.contact-card__value a:hover { color: var(--brand); }

/* ---------- 17. About --------------------------------------------------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.about-grid--reverse > *:first-child { order: 2; }
.cap-list { display: grid; gap: 16px; }
.cap-item { background: var(--surface); padding: 24px; display: flex; gap: 16px; }
.cap-item__no { font-family: var(--font-display); font-size: 26px; font-weight: 700; color: var(--brand); line-height: 32px; flex: 0 0 auto; }
.cap-item__title { font-size: 16px; font-weight: 700; line-height: 22px; }
.cap-item__desc { font-size: 13px; color: var(--text-2); line-height: 20px; margin-top: 6px; }

.patent-list { columns: 2; column-gap: 32px; }
.patent-list li {
  font-size: 13px; line-height: 22px;
  padding: 10px 0 10px 22px;
  border-bottom: 1px solid var(--line-2);
  position: relative;
  break-inside: avoid;
}
.patent-list li::before {
  content: ''; position: absolute; left: 0; top: 17px;
  width: 6px; height: 6px;
  border-right: 1.4px solid var(--brand);
  border-bottom: 1.4px solid var(--brand);
  transform: rotate(45deg);
}

/* ---------- 18. Footer --------------------------------------------------- */
.footer { background: var(--brand-ink); color: rgba(255, 255, 255, .72); margin-top: 0; }
.footer__top { border-bottom: 1px solid rgba(255, 255, 255, .1); }
.footer__grid {
  margin: 0 auto; max-width: var(--wrap);
  padding: 48px var(--gutter);
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
}
.footer__logo { height: 26px; width: auto; filter: brightness(0) invert(1); margin-bottom: 16px; }
.footer__tagline { font-size: 13px; line-height: 22px; max-width: 300px; }
.footer__title { color: #fff; font-size: 14px; font-weight: 700; margin-bottom: 16px; }
.footer__links { display: grid; gap: 10px; }
.footer__links a { font-size: 13px; line-height: 20px; transition: color var(--dur) var(--ease); }
.footer__links a:hover { color: #fff; }
.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, .1);
}
.footer__bottom-inner {
  margin: 0 auto; max-width: var(--wrap);
  padding: 20px var(--gutter);
  display: flex; flex-wrap: wrap; gap: 16px;
  align-items: center; justify-content: space-between;
  font-size: var(--fs-small);
}
.footer__legal { display: flex; flex-wrap: wrap; gap: 20px; }
.footer__legal a:hover { color: #fff; }
.footer__disclaimer {
  background: rgba(0, 0, 0, .18);
  font-size: var(--fs-small);
  line-height: 20px;
}
.footer__disclaimer-inner {
  margin: 0 auto; max-width: var(--wrap);
  padding: 16px var(--gutter);
}

/* ---------- 19. Language picker page ------------------------------------ */
.picker { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--brand-ink); padding: 40px var(--gutter); }
.picker__inner { width: 100%; max-width: 720px; }
.picker__logo { height: 32px; width: auto; filter: brightness(0) invert(1); margin-bottom: 32px; }
.picker__title { color: #fff; font-size: 30px; font-weight: 700; line-height: 40px; margin-bottom: 10px; }
.picker__text { color: rgba(255, 255, 255, .7); font-size: 15px; line-height: 24px; margin-bottom: 32px; }
.picker__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.picker__opt {
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .14);
  padding: 20px 22px;
  display: flex; align-items: center; justify-content: space-between;
  color: #fff;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.picker__opt:hover { background: rgba(255, 255, 255, .12); border-color: rgba(255, 255, 255, .3); }
.picker__opt b { font-size: 17px; display: block; }
.picker__opt span { font-size: var(--fs-small); color: rgba(255, 255, 255, .6); }
.picker__opt em { font-style: normal; font-size: var(--fs-small); color: rgba(255, 255, 255, .55); }
.picker__skip { margin-top: 28px; font-size: 13px; color: rgba(255, 255, 255, .55); }
.picker__skip a { color: #fff; text-decoration: underline; }

/* ---------- 20. Scroll reveal ------------------------------------------- */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } }

/* ---------- 21. Responsive ---------------------------------------------- */
@media screen and (max-width: 1439px) {
  .plate-primary { width: calc(50% - 8px); }
}
@media screen and (max-width: 1120px) {
  :root { --wrap: 100%; }
  .sec-wrapper { padding-left: var(--gutter); padding-right: var(--gutter); }
  .plate-grid { grid-template-columns: repeat(3, 1fr); }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-grid { grid-template-columns: repeat(3, 1fr); }
  .stat-row { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: repeat(2, 1fr); }
  .cat-item { grid-template-columns: 1fr; }
  .cat-item__media { min-height: 260px; }
  .pdp__hero-inner { grid-template-columns: 1fr; gap: 32px; }
  .proc-grid { grid-template-columns: 1fr; }
  .comp-grid { grid-template-columns: repeat(2, 1fr); }
  .dl-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .header__nav { display: none; }
  .burger { display: flex; }
}
@media screen and (max-width: 768px) {
  :root { --gutter: 16px; --fs-hero: 30px; --fs-hero-sub: 20px; --fs-sec: 20px; --lh-hero: 36px; }
  html[lang^='zh'] { --fs-hero: 28px; --fs-hero-sub: 19px; --fs-sec: 19px; }
  .sec-wrapper { padding-top: 24px; }
  .sec-wrapper__pad { padding-bottom: 24px; }
  .sec-title { line-height: 28px; margin-bottom: 14px; }
  .header__main { height: 56px; gap: 12px; }
  .header__utility-links span.hide-sm { display: none; }
  .plate-primary { width: 100%; height: auto; padding: 24px; }
  .plate-primary__img { width: 120px; height: 120px; }
  .plate-primary__sellpoint { height: auto; -webkit-line-clamp: 3; margin-bottom: 14px; }
  .plate-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .plate-normal { padding: 22px 12px; min-height: 0; }
  .plate-normal__img { height: 110px; }
  .plate-normal__title { font-size: 14px; }
  .plate-activity { height: 150px; }
  .plate-activity__body { padding: 0 20px; }
  .plate-discover-grid { grid-template-columns: 1fr; gap: 10px; }
  .plate-discover { height: 210px; }
  .plate-discover__body { padding: 20px 24px; }
  .plate-discover__title { font-size: 18px; }
  .adv-grid, .trust-grid, .stat-row, .comp-grid, .dl-grid, .rel-grid,
  .form-grid, .about-grid, .footer__grid, .picker__grid { grid-template-columns: 1fr; }
  .patent-list { columns: 1; }
  .pdp__title { font-size: 25px; line-height: 32px; }
  .pdp__section { padding: 36px var(--gutter); }
  .gallery__thumbs { grid-template-columns: repeat(4, 1fr); gap: 8px; }
  .spec-table th { width: 46%; }
  .spec-table th, .spec-table td { padding: 10px 10px; font-size: 13px; }
  .contact-panel { padding: 20px; }
  .btn { height: 42px; }
  .btn-block-sm { width: 100%; }
}

/* ---------- 22. Print --------------------------------------------------- */
@media print {
  .header, .footer, .hero__nav, .hero__dots, .drawer, .pdp__actions { display: none !important; }
  body { background: #fff; }
  .sec, .sec--alt, .pdp__section { background: #fff; }
}